Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

8. Joints

Introduction to Joints

Anatomy & Physiology

8. Joints

Introduction to Joints

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Multiple Choice

Which of the following joints is capable of pronation and supination?

Humeroulnar joint

Proximal radioulnar joint

Glenohumeral joint

Tibiofemoral joint

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Verified step by step guidance

Step 1: Begin by understanding the terms 'pronation' and 'supination.' Pronation refers to the rotation of the forearm so the palm faces downward or posteriorly, while supination refers to the rotation of the forearm so the palm faces upward or anteriorly.

Step 2: Identify the anatomical structures involved in pronation and supination. These movements occur at the forearm and involve the radius and ulna bones. Specifically, the proximal radioulnar joint is responsible for these rotational movements.

Step 3: Examine the listed joints to determine their functions. The humeroulnar joint is part of the elbow and primarily allows flexion and extension, not rotation. The glenohumeral joint is the shoulder joint, which allows a wide range of movements but does not perform pronation or supination. The tibiofemoral joint is the knee joint, which allows flexion and extension, not forearm rotation.

Step 4: Focus on the proximal radioulnar joint. This joint is a pivot joint that allows the radius to rotate around the ulna, enabling pronation and supination of the forearm.

Step 5: Conclude that the proximal radioulnar joint is the correct answer because it is the only joint among the options capable of performing pronation and supination.